An id on an <a> (anchor) tag assigns an identifier to the link.
The identifier must be unique across the page.
<a id="ms-link" target="_blank"
href="https://microsoft.com">Microsoft</a>
The id attribute assigns an identifier to the <a> element.
The id allows JavaScript to easily access the <a> element.
It is also used to point to a specific id selector in a style sheet.
Tip: id is a global attribute that can be applied to any HTML element.
<a id="identifier" />
| Value | Description |
|---|---|
| identifier | A unique alphanumeric string. The id value must begin with a letter ([A-Za-z]) and may be followed by any number of letters, digits ([0-9]), hyphens (-), underscores (_), colons (:), and periods (.). |
An <a> element with a unique id value.
Clicking the button displays the link's href value.
<div>
<a id="mylink" target="_blank"
href="https://microsoft.com">Microsoft</a>
<br /><br />
<button onclick="show();">Show href</button>
</div>
<script>
let show = () => {
let element = document.getElementById("mylink");
alert("Href = " + element.href);
}
</script>
The id attribute assigns a unique identifier to the link.
Clicking the button calls JavaScript which locates the link using the id.
Finally, the href value of the link is displayed in an alert box.
Here is when id support started for each browser:
 Chrome
|
1.0 | Sep 2008 |
 Firefox
|
1.0 | Sep 2002 |
 IE/Edge
|
1.0 | Aug 1995 |
 Opera
|
1.0 | Jan 2006 |
 Safari
|
1.0 | Jan 2003 |
Back to <a>
